Proper noun
Ceraunia
Alternative form of Ceryneia
Concluding that these objects were not ceraunia he compared collections to determine exactly what they were. Source: Internet
He begins his treatise with descriptions and classifications of the Pierres de Tonnerre et de Foudre, the ceraunia of contemporaneous European interest. Source: Internet
Vatican collections included artifacts from the New World of exactly the shapes of the supposed ceraunia. Source: Internet